Biodegradable alginate-tannic acid-lignin nanocomposite film for food packaging
A novel, biodegradable nanocomposite film for food packaging that combines sodium alginate with lignin nanoparticles and tannic acid, enhancing mechanical strength, barrier properties, and antimicrobial activity.
Overview
The proposed biodegradable alginate-tannic acid-lignin nanocomposite film aims to revolutionize food packaging by combining the natural biopolymer sodium alginate (SA) with lignin nanoparticles (LNP) and tannic acid (TA). This innovative solution enhances the mechanical strength, barrier properties against gases and water vapor, and introduces antimicrobial activity, UV-blocking capability, and thermal stability. This makes it an environmentally friendly alternative to traditional non-biodegradable packaging options, potentially extending the shelf life of food products.
Technical specifications
- Sodium Alginate (SA): A biodegradable, non-toxic biopolymer known for its excellent film-forming abilities.
- Lignin Nanoparticles (LNP): Serve as reinforcing agents that improve mechanical and thermal properties.
- Tannic Acid (TA): Acts as a cross-linking agent, enhancing the film's structural integrity and antimicrobial properties.
- Key Features:
- Enhanced mechanical strength and flexibility
- Superior barrier properties against gases and water vapor
- Antimicrobial and UV-blocking capabilities
- Biodegradable and biocompatible
Technology readiness level
Currently, the technology is at TRL 2, with foundational research and early-stage formulation testing underway. Future steps involve the preparation of the nanocomposite film, followed by comprehensive testing in real-world packaging applications to validate its performance.
About Chulalongkorn University
Chulalongkorn University is a comprehensive public research university in Bangkok, serving a large student body and advancing research from discovery through translation. Its campus anchors an urban innovation district where companies engage through co‑located labs, prototyping facilities, and startup incubation. The university’s integration with a major teaching hospital enables clinical studies and translational collaboration, while co‑op and executive programs connect corporate partners to talent. Research is supported by Thailand’s competitive national funding agencies and international sponsors. A dedicated technology transfer office manages IP, licensing, and startup formation, with streamlined contracting for industry‑sponsored work.
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